Coreless motors can work with ultrasonic (silent) decoders but don't try them with lower frequency ones. And don't try running them without a decoder even if your DCC system can drive dc locomotives. Coreless motors have very low inductance so the DCC type ac sails right through them, overheating them in very short time.
But keep in mind that coreless motors normally have brushes. They are not the brushless motors the OP is asking about. One type of brushless motor spins a permanent magnet armature inside a number of fixed electromagnets, just like a stepping motor. But unlike stepping motors which require some fairly complex electronics to sequence the electromagnets, they rely on feedback of the armature's position, often by Hall effect devices.
Stepping motors, in my opinion, will be the next big step forward in model locomotive control. Integrating the multiphase control circuits into a decoder would seem to be pretty straight forward. As stepping motors respond to the number of pulses fed to them, there would be no need to shuffle back and forth between analogue and digital in the control chain from throttle knob to locomotive wheels.
Jim
But keep in mind that coreless motors normally have brushes. They are not the brushless motors the OP is asking about. One type of brushless motor spins a permanent magnet armature inside a number of fixed electromagnets, just like a stepping motor. But unlike stepping motors which require some fairly complex electronics to sequence the electromagnets, they rely on feedback of the armature's position, often by Hall effect devices.
Stepping motors, in my opinion, will be the next big step forward in model locomotive control. Integrating the multiphase control circuits into a decoder would seem to be pretty straight forward. As stepping motors respond to the number of pulses fed to them, there would be no need to shuffle back and forth between analogue and digital in the control chain from throttle knob to locomotive wheels.
Jim